Arduino Mega

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Quoting verbatim from the Arduino website[[1]]

"The MEGA 2560 is designed for more complex projects. With 54 digital I/O pins, 16 analog inputs and a larger space for your sketch it is the recommended board for 3D printers and robotics projects.."

"The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Mega 2560 board is compatible with most shields designed for the Uno and the former boards Duemilanove or Diecimila."

Previous versions using the ATmega1280 processor are obsolete.


This is 400 pixels wide, and on the left.


  • Microcontroller: ATmega2560
  • Operating Voltage: 5V
  • Input Voltage (recommended): 7-12V
  • Input Voltage (limits): 6-20V
  • Digital I/O Pins: 54 (of which 15 provide PWM output)
  • Analog Input Pins: 16
  • DC Current per I/O Pin: 20 mA
  • DC Current for 3.3V Pin: 50 mA
  • Flash Memory: 256 KB of which 8 KB used by bootloader
  • SRAM : 8 KB
  • EEPROM : 4 KB
  • Clock Speed: 16 MHz
  • LEDs: 13

More details on the Arduino official page[[2]] including the schematic[[3]], Eagle files[[4]], and Pin Mapping [[5]].

NOTE: Previous versions have different pin numbers, processsor power etc. See [[6]] for example


  • The offical Arduino Page[[7]]
  • Arduino Software [[8]]
  • Arduino Mega getting started guide [[9]]
  • Slightly more indepth general Arduino guide [[10]]

Related Projects

The Arduino Mega, clones, and derivatives are being used with the generally peer-used RepRap Arduino Mega Pololu Shield (RAMPS) cape (add on board)


More powerful open source hardware controllers and shield exist!